Retaining wall block



FIG. 1 is a perspective view of a retaining wall block according to our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines in the drawings are included for the purpose of illustrating a portion of the retaining wall block that forms no part of the claimed design. 

The ornamental design for a retaining wall block, as shown and described. 